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Comparing libev/ev.c (file contents):
Revision 1.26 by root, Wed Oct 31 21:50:15 2007 UTC vs.
Revision 1.67 by root, Mon Nov 5 16:42:15 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
		55	#endif
29		56
30	#include <math.h>	57	#include <math.h>
31	#include <stdlib.h>	58	#include <stdlib.h>
32	#include <unistd.h>	59	#include <unistd.h>
33	#include <fcntl.h>	60	#include <fcntl.h>
…		…
37	#include <stdio.h>	64	#include <stdio.h>
38		65
39	#include <assert.h>	66	#include <assert.h>
40	#include <errno.h>	67	#include <errno.h>
41	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
42	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
43	#include <sys/time.h>	72	#include <sys/time.h>
44	#include <time.h>	73	#include <time.h>
45		74
		75	/**/
		76
46	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
47	# ifdef CLOCK_MONOTONIC
48	# define HAVE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
		79	#endif
		80
		81	#ifndef EV_USE_SELECT
		82	# define EV_USE_SELECT 1
		83	#endif
		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
		89	#ifndef EV_USE_EPOLL
		90	# define EV_USE_EPOLL 0
		91	#endif
		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
49	# endif	102	# endif
50	#endif	103	#endif
51		104
52	#ifndef HAVE_SELECT
53	# define HAVE_SELECT 1
54	#endif
55
56	#ifndef HAVE_EPOLL
57	# define HAVE_EPOLL 0
58	#endif
59
60	#ifndef HAVE_REALTIME	105	#ifndef EV_USE_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
62	#endif	107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
		116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
		118	# define EV_USE_REALTIME 0
		119	#endif
		120
		121	/**/
63		122
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		126	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
67		127
68	#include "ev.h"	128	#include "ev.h"
		129
		130	#if __GNUC__ >= 3
		131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
		137
		138	#define expect_false(expr) expect ((expr) != 0, 0)
		139	#define expect_true(expr) expect ((expr) != 0, 1)
		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
69		143
70	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
73		147
74	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
75	ev_tstamp ev_now;
76	int ev_method;
77		149
78	static int have_monotonic; /* runtime */	150	#if WIN32
79		151	/* note: the comment below could not be substantiated, but what would I care */
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
81	static void (*method_modify)(int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
82	static void (*method_poll)(ev_tstamp timeout);	154	#endif
83		155
84	/*****************************************************************************/	156	/*****************************************************************************/
85		157
86	ev_tstamp	158	typedef struct
		159	{
		160	struct ev_watcher_list *head;
		161	unsigned char events;
		162	unsigned char reify;
		163	} ANFD;
		164
		165	typedef struct
		166	{
		167	W w;
		168	int events;
		169	} ANPENDING;
		170
		171	#if EV_MULTIPLICITY
		172
		173	struct ev_loop
		174	{
		175	# define VAR(name,decl) decl;
		176	# include "ev_vars.h"
		177	};
		178	# undef VAR
		179	# include "ev_wrap.h"
		180
		181	#else
		182
		183	# define VAR(name,decl) static decl;
		184	# include "ev_vars.h"
		185	# undef VAR
		186
		187	#endif
		188
		189	/*****************************************************************************/
		190
		191	inline ev_tstamp
87	ev_time (void)	192	ev_time (void)
88	{	193	{
89	#if HAVE_REALTIME	194	#if EV_USE_REALTIME
90	struct timespec ts;	195	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	196	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	197	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	198	#else
94	struct timeval tv;	199	struct timeval tv;
95	gettimeofday (&tv, 0);	200	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	201	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	202	#endif
98	}	203	}
99		204
100	static ev_tstamp	205	inline ev_tstamp
101	get_clock (void)	206	get_clock (void)
102	{	207	{
103	#if HAVE_MONOTONIC	208	#if EV_USE_MONOTONIC
104	if (have_monotonic)	209	if (expect_true (have_monotonic))
105	{	210	{
106	struct timespec ts;	211	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	212	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	213	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	214	}
110	#endif	215	#endif
111		216
112	return ev_time ();	217	return ev_time ();
113	}	218	}
114		219
		220	ev_tstamp
		221	ev_now (EV_P)
		222	{
		223	return rt_now;
		224	}
		225
		226	#define array_roundsize(base,n) ((n) | 4 & ~3)
		227
115	#define array_needsize(base,cur,cnt,init) \	228	#define array_needsize(base,cur,cnt,init) \
116	if ((cnt) > cur) \	229	if (expect_false ((cnt) > cur)) \
117	{ \	230	{ \
118	int newcnt = cur; \	231	int newcnt = cur; \
119	do \	232	do \
120	{ \	233	{ \
121	newcnt = (newcnt << 1) | 4 & ~3; \	234	newcnt = array_roundsize (base, newcnt << 1); \
122	} \	235	} \
123	while ((cnt) > newcnt); \	236	while ((cnt) > newcnt); \
124	\	237	\
125	base = realloc (base, sizeof (*base) * (newcnt)); \	238	base = realloc (base, sizeof (*base) * (newcnt)); \
126	init (base + cur, newcnt - cur); \	239	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	240	cur = newcnt; \
128	}	241	}
129		242
		243	#define array_slim(stem) \
		244	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		245	{ \
		246	stem ## max = array_roundsize (stem ## cnt >> 1); \
		247	base = realloc (base, sizeof (*base) * (stem ## max)); \
		248	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		249	}
		250
		251	#define array_free(stem, idx) \
		252	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		253
130	/*****************************************************************************/	254	/*****************************************************************************/
131		255
132	typedef struct
133	{
134	struct ev_io *head;
135	unsigned char wev, rev; /* want, received event set */
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static int *fdchanges;
142	static int fdchangemax, fdchangecnt;
143
144	static void	256	static void
145	anfds_init (ANFD *base, int count)	257	anfds_init (ANFD *base, int count)
146	{	258	{
147	while (count--)	259	while (count--)
148	{	260	{
149	base->head = 0;	261	base->head = 0;
150	base->wev = base->rev = EV_NONE;	262	base->events = EV_NONE;
		263	base->reify = 0;
		264
151	++base;	265	++base;
152	}	266	}
153	}	267	}
154		268
155	typedef struct
156	{
157	W w;
158	int events;
159	} ANPENDING;
160
161	static ANPENDING *pendings;
162	static int pendingmax, pendingcnt;
163
164	static void	269	static void
165	event (W w, int events)	270	event (EV_P_ W w, int events)
166	{	271	{
167	if (w->active)	272	if (w->pending)
168	{	273	{
169	w->pending = ++pendingcnt;
170	array_needsize (pendings, pendingmax, pendingcnt, );
171	pendings [pendingcnt - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	274	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		275	return;
173	}	276	}
174	}
175		277
		278	w->pending = ++pendingcnt [ABSPRI (w)];
		279	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		280	pendings [ABSPRI (w)][w->pending - 1].w = w;
		281	pendings [ABSPRI (w)][w->pending - 1].events = events;
		282	}
		283
176	static void	284	static void
		285	queue_events (EV_P_ W *events, int eventcnt, int type)
		286	{
		287	int i;
		288
		289	for (i = 0; i < eventcnt; ++i)
		290	event (EV_A_ events [i], type);
		291	}
		292
		293	static void
177	fd_event (int fd, int events)	294	fd_event (EV_P_ int fd, int events)
178	{	295	{
179	ANFD *anfd = anfds + fd;	296	ANFD *anfd = anfds + fd;
180	struct ev_io *w;	297	struct ev_io *w;
181		298
182	for (w = anfd->head; w; w = w->next)	299	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
183	{	300	{
184	int ev = w->events & events;	301	int ev = w->events & events;
185		302
186	if (ev)	303	if (ev)
187	event ((W)w, ev);	304	event (EV_A_ (W)w, ev);
188	}	305	}
189	}	306	}
190		307
		308	/*****************************************************************************/
		309
191	static void	310	static void
192	queue_events (W *events, int eventcnt, int type)	311	fd_reify (EV_P)
193	{	312	{
194	int i;	313	int i;
195		314
196	for (i = 0; i < eventcnt; ++i)	315	for (i = 0; i < fdchangecnt; ++i)
197	event (events [i], type);	316	{
		317	int fd = fdchanges [i];
		318	ANFD *anfd = anfds + fd;
		319	struct ev_io *w;
		320
		321	int events = 0;
		322
		323	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		324	events |= w->events;
		325
		326	anfd->reify = 0;
		327
		328	method_modify (EV_A_ fd, anfd->events, events);
		329	anfd->events = events;
		330	}
		331
		332	fdchangecnt = 0;
		333	}
		334
		335	static void
		336	fd_change (EV_P_ int fd)
		337	{
		338	if (anfds [fd].reify || fdchangecnt < 0)
		339	return;
		340
		341	anfds [fd].reify = 1;
		342
		343	++fdchangecnt;
		344	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		345	fdchanges [fdchangecnt - 1] = fd;
		346	}
		347
		348	static void
		349	fd_kill (EV_P_ int fd)
		350	{
		351	struct ev_io *w;
		352
		353	while ((w = (struct ev_io *)anfds [fd].head))
		354	{
		355	ev_io_stop (EV_A_ w);
		356	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		357	}
198	}	358	}
199		359
200	/* called on EBADF to verify fds */	360	/* called on EBADF to verify fds */
201	static void	361	static void
202	fd_recheck (void)	362	fd_ebadf (EV_P)
203	{	363	{
204	int fd;	364	int fd;
205		365
206	for (fd = 0; fd < anfdmax; ++fd)	366	for (fd = 0; fd < anfdmax; ++fd)
207	if (anfds [fd].wev)	367	if (anfds [fd].events)
208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	368	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
209	while (anfds [fd].head)	369	fd_kill (EV_A_ fd);
		370	}
		371
		372	/* called on ENOMEM in select/poll to kill some fds and retry */
		373	static void
		374	fd_enomem (EV_P)
		375	{
		376	int fd;
		377
		378	for (fd = anfdmax; fd--; )
		379	if (anfds [fd].events)
210	{	380	{
211	event ((W)anfds [fd].head, EV_ERROR);	381	close (fd);
212	evio_stop (anfds [fd].head);	382	fd_kill (EV_A_ fd);
		383	return;
213	}	384	}
		385	}
		386
		387	/* susually called after fork if method needs to re-arm all fds from scratch */
		388	static void
		389	fd_rearm_all (EV_P)
		390	{
		391	int fd;
		392
		393	/* this should be highly optimised to not do anything but set a flag */
		394	for (fd = 0; fd < anfdmax; ++fd)
		395	if (anfds [fd].events)
		396	{
		397	anfds [fd].events = 0;
		398	fd_change (EV_A_ fd);
		399	}
214	}	400	}
215		401
216	/*****************************************************************************/	402	/*****************************************************************************/
217		403
218	static struct ev_timer **timers;
219	static int timermax, timercnt;
220
221	static struct ev_periodic **periodics;
222	static int periodicmax, periodiccnt;
223
224	static void	404	static void
225	upheap (WT *timers, int k)	405	upheap (WT *heap, int k)
226	{	406	{
227	WT w = timers [k];	407	WT w = heap [k];
228		408
229	while (k && timers [k >> 1]->at > w->at)	409	while (k && heap [k >> 1]->at > w->at)
230	{	410	{
231	timers [k] = timers [k >> 1];	411	heap [k] = heap [k >> 1];
232	timers [k]->active = k + 1;	412	((W)heap [k])->active = k + 1;
233	k >>= 1;	413	k >>= 1;
234	}	414	}
235		415
236	timers [k] = w;	416	heap [k] = w;
237	timers [k]->active = k + 1;	417	((W)heap [k])->active = k + 1;
238		418
239	}	419	}
240		420
241	static void	421	static void
242	downheap (WT *timers, int N, int k)	422	downheap (WT *heap, int N, int k)
243	{	423	{
244	WT w = timers [k];	424	WT w = heap [k];
245		425
246	while (k < (N >> 1))	426	while (k < (N >> 1))
247	{	427	{
248	int j = k << 1;	428	int j = k << 1;
249		429
250	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	430	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
251	++j;	431	++j;
252		432
253	if (w->at <= timers [j]->at)	433	if (w->at <= heap [j]->at)
254	break;	434	break;
255		435
256	timers [k] = timers [j];	436	heap [k] = heap [j];
257	timers [k]->active = k + 1;	437	((W)heap [k])->active = k + 1;
258	k = j;	438	k = j;
259	}	439	}
260		440
261	timers [k] = w;	441	heap [k] = w;
262	timers [k]->active = k + 1;	442	((W)heap [k])->active = k + 1;
263	}	443	}
264		444
265	/*****************************************************************************/	445	/*****************************************************************************/
266		446
267	typedef struct	447	typedef struct
268	{	448	{
269	struct ev_signal *head;	449	struct ev_watcher_list *head;
270	sig_atomic_t gotsig;	450	sig_atomic_t volatile gotsig;
271	} ANSIG;	451	} ANSIG;
272		452
273	static ANSIG *signals;	453	static ANSIG *signals;
274	static int signalmax;	454	static int signalmax;
275		455
276	static int sigpipe [2];	456	static int sigpipe [2];
277	static sig_atomic_t gotsig;	457	static sig_atomic_t volatile gotsig;
278	static struct ev_io sigev;	458	static struct ev_io sigev;
279		459
280	static void	460	static void
281	signals_init (ANSIG *base, int count)	461	signals_init (ANSIG *base, int count)
282	{	462	{
283	while (count--)	463	while (count--)
284	{	464	{
285	base->head = 0;	465	base->head = 0;
286	base->gotsig = 0;	466	base->gotsig = 0;
		467
287	++base;	468	++base;
288	}	469	}
289	}	470	}
290		471
291	static void	472	static void
292	sighandler (int signum)	473	sighandler (int signum)
293	{	474	{
		475	#if WIN32
		476	signal (signum, sighandler);
		477	#endif
		478
294	signals [signum - 1].gotsig = 1;	479	signals [signum - 1].gotsig = 1;
295		480
296	if (!gotsig)	481	if (!gotsig)
297	{	482	{
		483	int old_errno = errno;
298	gotsig = 1;	484	gotsig = 1;
299	write (sigpipe [1], &gotsig, 1);	485	write (sigpipe [1], &signum, 1);
		486	errno = old_errno;
300	}	487	}
301	}	488	}
302		489
303	static void	490	static void
304	sigcb (struct ev_io *iow, int revents)	491	sigcb (EV_P_ struct ev_io *iow, int revents)
305	{	492	{
306	struct ev_signal *w;	493	struct ev_watcher_list *w;
307	int sig;	494	int signum;
308		495
		496	read (sigpipe [0], &revents, 1);
309	gotsig = 0;	497	gotsig = 0;
310	read (sigpipe [0], &revents, 1);
311		498
312	for (sig = signalmax; sig--; )	499	for (signum = signalmax; signum--; )
313	if (signals [sig].gotsig)	500	if (signals [signum].gotsig)
314	{	501	{
315	signals [sig].gotsig = 0;	502	signals [signum].gotsig = 0;
316		503
317	for (w = signals [sig].head; w; w = w->next)	504	for (w = signals [signum].head; w; w = w->next)
318	event ((W)w, EV_SIGNAL);	505	event (EV_A_ (W)w, EV_SIGNAL);
319	}	506	}
320	}	507	}
321		508
322	static void	509	static void
323	siginit (void)	510	siginit (EV_P)
324	{	511	{
		512	#ifndef WIN32
325	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	513	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
326	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	514	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
327		515
328	/* rather than sort out wether we really need nb, set it */	516	/* rather than sort out wether we really need nb, set it */
329	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	517	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
330	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	518	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		519	#endif
331		520
332	evio_set (&sigev, sigpipe [0], EV_READ);	521	ev_io_set (&sigev, sigpipe [0], EV_READ);
333	evio_start (&sigev);	522	ev_io_start (EV_A_ &sigev);
		523	ev_unref (EV_A); /* child watcher should not keep loop alive */
334	}	524	}
335		525
336	/*****************************************************************************/	526	/*****************************************************************************/
337		527
338	static struct ev_idle **idles;	528	#ifndef WIN32
339	static int idlemax, idlecnt;
340
341	static struct ev_prepare **prepares;
342	static int preparemax, preparecnt;
343
344	static struct ev_check **checks;
345	static int checkmax, checkcnt;
346
347	/*****************************************************************************/
348		529
349	static struct ev_child *childs [PID_HASHSIZE];	530	static struct ev_child *childs [PID_HASHSIZE];
350	static struct ev_signal childev;	531	static struct ev_signal childev;
351		532
352	#ifndef WCONTINUED	533	#ifndef WCONTINUED
353	# define WCONTINUED 0	534	# define WCONTINUED 0
354	#endif	535	#endif
355		536
356	static void	537	static void
357	childcb (struct ev_signal *sw, int revents)	538	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
358	{	539	{
359	struct ev_child *w;	540	struct ev_child *w;
		541
		542	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		543	if (w->pid == pid || !w->pid)
		544	{
		545	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		546	w->rpid = pid;
		547	w->rstatus = status;
		548	event (EV_A_ (W)w, EV_CHILD);
		549	}
		550	}
		551
		552	static void
		553	childcb (EV_P_ struct ev_signal *sw, int revents)
		554	{
360	int pid, status;	555	int pid, status;
361		556
362	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	557	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
363	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	558	{
364	if (w->pid == pid || w->pid == -1)	559	/* make sure we are called again until all childs have been reaped */
365	{	560	event (EV_A_ (W)sw, EV_SIGNAL);
366	w->status = status;	561
367	event ((W)w, EV_CHILD);	562	child_reap (EV_A_ sw, pid, pid, status);
368	}	563	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		564	}
369	}	565	}
		566
		567	#endif
370		568
371	/*****************************************************************************/	569	/*****************************************************************************/
372		570
		571	#if EV_USE_KQUEUE
		572	# include "ev_kqueue.c"
		573	#endif
373	#if HAVE_EPOLL	574	#if EV_USE_EPOLL
374	# include "ev_epoll.c"	575	# include "ev_epoll.c"
375	#endif	576	#endif
		577	#if EV_USE_POLL
		578	# include "ev_poll.c"
		579	#endif
376	#if HAVE_SELECT	580	#if EV_USE_SELECT
377	# include "ev_select.c"	581	# include "ev_select.c"
378	#endif	582	#endif
379		583
380	int	584	int
381	ev_version_major (void)	585	ev_version_major (void)
…		…
387	ev_version_minor (void)	591	ev_version_minor (void)
388	{	592	{
389	return EV_VERSION_MINOR;	593	return EV_VERSION_MINOR;
390	}	594	}
391		595
392	int ev_init (int flags)	596	/* return true if we are running with elevated privileges and should ignore env variables */
		597	static int
		598	enable_secure (void)
393	{	599	{
		600	#ifdef WIN32
		601	return 0;
		602	#else
		603	return getuid () != geteuid ()
		604	|| getgid () != getegid ();
		605	#endif
		606	}
		607
		608	int
		609	ev_method (EV_P)
		610	{
		611	return method;
		612	}
		613
		614	static void
		615	loop_init (EV_P_ int methods)
		616	{
394	if (!ev_method)	617	if (!method)
395	{	618	{
396	#if HAVE_MONOTONIC	619	#if EV_USE_MONOTONIC
397	{	620	{
398	struct timespec ts;	621	struct timespec ts;
399	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	622	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
400	have_monotonic = 1;	623	have_monotonic = 1;
401	}	624	}
402	#endif	625	#endif
403		626
404	ev_now = ev_time ();	627	rt_now = ev_time ();
405	now = get_clock ();	628	mn_now = get_clock ();
		629	now_floor = mn_now;
406	diff = ev_now - now;	630	rtmn_diff = rt_now - mn_now;
407		631
		632	if (methods == EVMETHOD_AUTO)
		633	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		634	methods = atoi (getenv ("LIBEV_METHODS"));
		635	else
		636	methods = EVMETHOD_ANY;
		637
		638	method = 0;
		639	#if EV_USE_WIN32
		640	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		641	#endif
		642	#if EV_USE_KQUEUE
		643	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		644	#endif
		645	#if EV_USE_EPOLL
		646	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		647	#endif
		648	#if EV_USE_POLL
		649	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		650	#endif
		651	#if EV_USE_SELECT
		652	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		653	#endif
		654	}
		655	}
		656
		657	void
		658	loop_destroy (EV_P)
		659	{
		660	int i;
		661
		662	#if EV_USE_WIN32
		663	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		664	#endif
		665	#if EV_USE_KQUEUE
		666	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		667	#endif
		668	#if EV_USE_EPOLL
		669	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		670	#endif
		671	#if EV_USE_POLL
		672	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		673	#endif
		674	#if EV_USE_SELECT
		675	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		676	#endif
		677
		678	for (i = NUMPRI; i--; )
		679	array_free (pending, [i]);
		680
		681	array_free (fdchange, );
		682	array_free (timer, );
		683	array_free (periodic, );
		684	array_free (idle, );
		685	array_free (prepare, );
		686	array_free (check, );
		687
		688	method = 0;
		689	/*TODO*/
		690	}
		691
		692	void
		693	loop_fork (EV_P)
		694	{
		695	/*TODO*/
		696	#if EV_USE_EPOLL
		697	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		698	#endif
		699	#if EV_USE_KQUEUE
		700	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		701	#endif
		702	}
		703
		704	#if EV_MULTIPLICITY
		705	struct ev_loop *
		706	ev_loop_new (int methods)
		707	{
		708	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		709
		710	loop_init (EV_A_ methods);
		711
		712	if (ev_method (EV_A))
		713	return loop;
		714
		715	return 0;
		716	}
		717
		718	void
		719	ev_loop_destroy (EV_P)
		720	{
		721	loop_destroy (EV_A);
		722	free (loop);
		723	}
		724
		725	void
		726	ev_loop_fork (EV_P)
		727	{
		728	loop_fork (EV_A);
		729	}
		730
		731	#endif
		732
		733	#if EV_MULTIPLICITY
		734	struct ev_loop default_loop_struct;
		735	static struct ev_loop *default_loop;
		736
		737	struct ev_loop *
		738	#else
		739	static int default_loop;
		740
		741	int
		742	#endif
		743	ev_default_loop (int methods)
		744	{
		745	if (sigpipe [0] == sigpipe [1])
408	if (pipe (sigpipe))	746	if (pipe (sigpipe))
409	return 0;	747	return 0;
410		748
411	ev_method = EVMETHOD_NONE;	749	if (!default_loop)
412	#if HAVE_EPOLL	750	{
413	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	751	#if EV_MULTIPLICITY
		752	struct ev_loop *loop = default_loop = &default_loop_struct;
		753	#else
		754	default_loop = 1;
414	#endif	755	#endif
415	#if HAVE_SELECT
416	if (ev_method == EVMETHOD_NONE) select_init (flags);
417	#endif
418		756
		757	loop_init (EV_A_ methods);
		758
419	if (ev_method)	759	if (ev_method (EV_A))
420	{	760	{
421	evw_init (&sigev, sigcb);	761	ev_watcher_init (&sigev, sigcb);
		762	ev_set_priority (&sigev, EV_MAXPRI);
422	siginit ();	763	siginit (EV_A);
423		764
		765	#ifndef WIN32
424	evsignal_init (&childev, childcb, SIGCHLD);	766	ev_signal_init (&childev, childcb, SIGCHLD);
		767	ev_set_priority (&childev, EV_MAXPRI);
425	evsignal_start (&childev);	768	ev_signal_start (EV_A_ &childev);
		769	ev_unref (EV_A); /* child watcher should not keep loop alive */
		770	#endif
426	}	771	}
		772	else
		773	default_loop = 0;
427	}	774	}
428		775
429	return ev_method;	776	return default_loop;
430	}	777	}
431		778
432	/*****************************************************************************/
433
434	void	779	void
435	ev_prefork (void)	780	ev_default_destroy (void)
436	{	781	{
437	/* nop */	782	#if EV_MULTIPLICITY
438	}	783	struct ev_loop *loop = default_loop;
439
440	void
441	ev_postfork_parent (void)
442	{
443	/* nop */
444	}
445
446	void
447	ev_postfork_child (void)
448	{
449	#if HAVE_EPOLL
450	if (ev_method == EVMETHOD_EPOLL)
451	epoll_postfork_child ();
452	#endif	784	#endif
453		785
		786	ev_ref (EV_A); /* child watcher */
		787	ev_signal_stop (EV_A_ &childev);
		788
		789	ev_ref (EV_A); /* signal watcher */
454	evio_stop (&sigev);	790	ev_io_stop (EV_A_ &sigev);
		791
		792	close (sigpipe [0]); sigpipe [0] = 0;
		793	close (sigpipe [1]); sigpipe [1] = 0;
		794
		795	loop_destroy (EV_A);
		796	}
		797
		798	void
		799	ev_default_fork (void)
		800	{
		801	#if EV_MULTIPLICITY
		802	struct ev_loop *loop = default_loop;
		803	#endif
		804
		805	loop_fork (EV_A);
		806
		807	ev_io_stop (EV_A_ &sigev);
455	close (sigpipe [0]);	808	close (sigpipe [0]);
456	close (sigpipe [1]);	809	close (sigpipe [1]);
457	pipe (sigpipe);	810	pipe (sigpipe);
		811
		812	ev_ref (EV_A); /* signal watcher */
458	siginit ();	813	siginit (EV_A);
459	}	814	}
460		815
461	/*****************************************************************************/	816	/*****************************************************************************/
462		817
463	static void	818	static void
464	fd_reify (void)	819	call_pending (EV_P)
465	{	820	{
466	int i;	821	int pri;
467		822
468	for (i = 0; i < fdchangecnt; ++i)	823	for (pri = NUMPRI; pri--; )
469	{	824	while (pendingcnt [pri])
470	int fd = fdchanges [i];
471	ANFD *anfd = anfds + fd;
472	struct ev_io *w;
473
474	int wev = 0;
475
476	for (w = anfd->head; w; w = w->next)
477	wev |= w->events;
478
479	if (anfd->wev != wev)
480	{	825	{
481	method_modify (fd, anfd->wev, wev);
482	anfd->wev = wev;
483	}
484	}
485
486	fdchangecnt = 0;
487	}
488
489	static void
490	call_pending (void)
491	{
492	while (pendingcnt)
493	{
494	ANPENDING *p = pendings + --pendingcnt;	826	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
495		827
496	if (p->w)	828	if (p->w)
497	{	829	{
498	p->w->pending = 0;	830	p->w->pending = 0;
499	p->w->cb (p->w, p->events);	831	p->w->cb (EV_A_ p->w, p->events);
500	}	832	}
501	}	833	}
502	}	834	}
503		835
504	static void	836	static void
505	timers_reify (void)	837	timers_reify (EV_P)
506	{	838	{
507	while (timercnt && timers [0]->at <= now)	839	while (timercnt && ((WT)timers [0])->at <= mn_now)
508	{	840	{
509	struct ev_timer *w = timers [0];	841	struct ev_timer *w = timers [0];
510		842
511	event ((W)w, EV_TIMEOUT);	843	assert (("inactive timer on timer heap detected", ev_is_active (w)));
512		844
513	/* first reschedule or stop timer */	845	/* first reschedule or stop timer */
514	if (w->repeat)	846	if (w->repeat)
515	{	847	{
		848	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
516	w->at = now + w->repeat;	849	((WT)w)->at = mn_now + w->repeat;
517	assert (("timer timeout in the past, negative repeat?", w->at > now));
518	downheap ((WT *)timers, timercnt, 0);	850	downheap ((WT *)timers, timercnt, 0);
519	}	851	}
520	else	852	else
521	evtimer_stop (w); /* nonrepeating: stop timer */	853	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
522	}
523	}
524		854
		855	event (EV_A_ (W)w, EV_TIMEOUT);
		856	}
		857	}
		858
525	static void	859	static void
526	periodics_reify (void)	860	periodics_reify (EV_P)
527	{	861	{
528	while (periodiccnt && periodics [0]->at <= ev_now)	862	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
529	{	863	{
530	struct ev_periodic *w = periodics [0];	864	struct ev_periodic *w = periodics [0];
		865
		866	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
531		867
532	/* first reschedule or stop timer */	868	/* first reschedule or stop timer */
533	if (w->interval)	869	if (w->interval)
534	{	870	{
535	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	871	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
536	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	872	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
537	downheap ((WT *)periodics, periodiccnt, 0);	873	downheap ((WT *)periodics, periodiccnt, 0);
538	}	874	}
539	else	875	else
540	evperiodic_stop (w); /* nonrepeating: stop timer */	876	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
541		877
542	event ((W)w, EV_TIMEOUT);	878	event (EV_A_ (W)w, EV_PERIODIC);
543	}	879	}
544	}	880	}
545		881
546	static void	882	static void
547	periodics_reschedule (ev_tstamp diff)	883	periodics_reschedule (EV_P)
548	{	884	{
549	int i;	885	int i;
550		886
551	/* adjust periodics after time jump */	887	/* adjust periodics after time jump */
552	for (i = 0; i < periodiccnt; ++i)	888	for (i = 0; i < periodiccnt; ++i)
553	{	889	{
554	struct ev_periodic *w = periodics [i];	890	struct ev_periodic *w = periodics [i];
555		891
556	if (w->interval)	892	if (w->interval)
557	{	893	{
558	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	894	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
559		895
560	if (fabs (diff) >= 1e-4)	896	if (fabs (diff) >= 1e-4)
561	{	897	{
562	evperiodic_stop (w);	898	ev_periodic_stop (EV_A_ w);
563	evperiodic_start (w);	899	ev_periodic_start (EV_A_ w);
564		900
565	i = 0; /* restart loop, inefficient, but time jumps should be rare */	901	i = 0; /* restart loop, inefficient, but time jumps should be rare */
566	}	902	}
567	}	903	}
568	}	904	}
569	}	905	}
570		906
		907	inline int
		908	time_update_monotonic (EV_P)
		909	{
		910	mn_now = get_clock ();
		911
		912	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		913	{
		914	rt_now = rtmn_diff + mn_now;
		915	return 0;
		916	}
		917	else
		918	{
		919	now_floor = mn_now;
		920	rt_now = ev_time ();
		921	return 1;
		922	}
		923	}
		924
571	static void	925	static void
572	time_update (void)	926	time_update (EV_P)
573	{	927	{
574	int i;	928	int i;
575		929
576	ev_now = ev_time ();	930	#if EV_USE_MONOTONIC
577
578	if (have_monotonic)	931	if (expect_true (have_monotonic))
579	{	932	{
580	ev_tstamp odiff = diff;	933	if (time_update_monotonic (EV_A))
581
582	for (i = 4; --i; ) /* loop a few times, before making important decisions */
583	{	934	{
584	now = get_clock ();	935	ev_tstamp odiff = rtmn_diff;
		936
		937	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		938	{
585	diff = ev_now - now;	939	rtmn_diff = rt_now - mn_now;
586		940
587	if (fabs (odiff - diff) < MIN_TIMEJUMP)	941	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
588	return; /* all is well */	942	return; /* all is well */
589		943
590	ev_now = ev_time ();	944	rt_now = ev_time ();
		945	mn_now = get_clock ();
		946	now_floor = mn_now;
		947	}
		948
		949	periodics_reschedule (EV_A);
		950	/* no timer adjustment, as the monotonic clock doesn't jump */
		951	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
591	}	952	}
592
593	periodics_reschedule (diff - odiff);
594	/* no timer adjustment, as the monotonic clock doesn't jump */
595	}	953	}
596	else	954	else
		955	#endif
597	{	956	{
598	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	957	rt_now = ev_time ();
		958
		959	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
599	{	960	{
600	periodics_reschedule (ev_now - now);	961	periodics_reschedule (EV_A);
601		962
602	/* adjust timers. this is easy, as the offset is the same for all */	963	/* adjust timers. this is easy, as the offset is the same for all */
603	for (i = 0; i < timercnt; ++i)	964	for (i = 0; i < timercnt; ++i)
604	timers [i]->at += diff;	965	((WT)timers [i])->at += rt_now - mn_now;
605	}	966	}
606		967
607	now = ev_now;	968	mn_now = rt_now;
608	}	969	}
609	}	970	}
610		971
611	int ev_loop_done;	972	void
		973	ev_ref (EV_P)
		974	{
		975	++activecnt;
		976	}
612		977
		978	void
		979	ev_unref (EV_P)
		980	{
		981	--activecnt;
		982	}
		983
		984	static int loop_done;
		985
		986	void
613	void ev_loop (int flags)	987	ev_loop (EV_P_ int flags)
614	{	988	{
615	double block;	989	double block;
616	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	990	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
617		991
618	do	992	do
619	{	993	{
620	/* queue check watchers (and execute them) */	994	/* queue check watchers (and execute them) */
621	if (preparecnt)	995	if (expect_false (preparecnt))
622	{	996	{
623	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	997	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
624	call_pending ();	998	call_pending (EV_A);
625	}	999	}
626		1000
627	/* update fd-related kernel structures */	1001	/* update fd-related kernel structures */
628	fd_reify ();	1002	fd_reify (EV_A);
629		1003
630	/* calculate blocking time */	1004	/* calculate blocking time */
631		1005
632	/* we only need this for !monotonic clockor timers, but as we basically	1006	/* we only need this for !monotonic clockor timers, but as we basically
633	always have timers, we just calculate it always */	1007	always have timers, we just calculate it always */
		1008	#if EV_USE_MONOTONIC
		1009	if (expect_true (have_monotonic))
		1010	time_update_monotonic (EV_A);
		1011	else
		1012	#endif
		1013	{
634	ev_now = ev_time ();	1014	rt_now = ev_time ();
		1015	mn_now = rt_now;
		1016	}
635		1017
636	if (flags & EVLOOP_NONBLOCK || idlecnt)	1018	if (flags & EVLOOP_NONBLOCK || idlecnt)
637	block = 0.;	1019	block = 0.;
638	else	1020	else
639	{	1021	{
640	block = MAX_BLOCKTIME;	1022	block = MAX_BLOCKTIME;
641		1023
642	if (timercnt)	1024	if (timercnt)
643	{	1025	{
644	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1026	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
645	if (block > to) block = to;	1027	if (block > to) block = to;
646	}	1028	}
647		1029
648	if (periodiccnt)	1030	if (periodiccnt)
649	{	1031	{
650	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1032	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
651	if (block > to) block = to;	1033	if (block > to) block = to;
652	}	1034	}
653		1035
654	if (block < 0.) block = 0.;	1036	if (block < 0.) block = 0.;
655	}	1037	}
656		1038
657	method_poll (block);	1039	method_poll (EV_A_ block);
658		1040
659	/* update ev_now, do magic */	1041	/* update rt_now, do magic */
660	time_update ();	1042	time_update (EV_A);
661		1043
662	/* queue pending timers and reschedule them */	1044	/* queue pending timers and reschedule them */
663	timers_reify (); /* relative timers called last */	1045	timers_reify (EV_A); /* relative timers called last */
664	periodics_reify (); /* absolute timers called first */	1046	periodics_reify (EV_A); /* absolute timers called first */
665		1047
666	/* queue idle watchers unless io or timers are pending */	1048	/* queue idle watchers unless io or timers are pending */
667	if (!pendingcnt)	1049	if (!pendingcnt)
668	queue_events ((W *)idles, idlecnt, EV_IDLE);	1050	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
669		1051
670	/* queue check watchers, to be executed first */	1052	/* queue check watchers, to be executed first */
671	if (checkcnt)	1053	if (checkcnt)
672	queue_events ((W *)checks, checkcnt, EV_CHECK);	1054	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
673		1055
674	call_pending ();	1056	call_pending (EV_A);
675	}	1057	}
676	while (!ev_loop_done);	1058	while (activecnt && !loop_done);
677		1059
678	if (ev_loop_done != 2)	1060	if (loop_done != 2)
679	ev_loop_done = 0;	1061	loop_done = 0;
		1062	}
		1063
		1064	void
		1065	ev_unloop (EV_P_ int how)
		1066	{
		1067	loop_done = how;
680	}	1068	}
681		1069
682	/*****************************************************************************/	1070	/*****************************************************************************/
683		1071
684	static void	1072	inline void
685	wlist_add (WL *head, WL elem)	1073	wlist_add (WL *head, WL elem)
686	{	1074	{
687	elem->next = *head;	1075	elem->next = *head;
688	*head = elem;	1076	*head = elem;
689	}	1077	}
690		1078
691	static void	1079	inline void
692	wlist_del (WL *head, WL elem)	1080	wlist_del (WL *head, WL elem)
693	{	1081	{
694	while (*head)	1082	while (*head)
695	{	1083	{
696	if (*head == elem)	1084	if (*head == elem)
…		…
701		1089
702	head = &(*head)->next;	1090	head = &(*head)->next;
703	}	1091	}
704	}	1092	}
705		1093
706	static void	1094	inline void
707	ev_clear (W w)	1095	ev_clear_pending (EV_P_ W w)
708	{	1096	{
709	if (w->pending)	1097	if (w->pending)
710	{	1098	{
711	pendings [w->pending - 1].w = 0;	1099	pendings [ABSPRI (w)][w->pending - 1].w = 0;
712	w->pending = 0;	1100	w->pending = 0;
713	}	1101	}
714	}	1102	}
715		1103
716	static void	1104	inline void
717	ev_start (W w, int active)	1105	ev_start (EV_P_ W w, int active)
718	{	1106	{
		1107	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1108	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1109
719	w->active = active;	1110	w->active = active;
		1111	ev_ref (EV_A);
720	}	1112	}
721		1113
722	static void	1114	inline void
723	ev_stop (W w)	1115	ev_stop (EV_P_ W w)
724	{	1116	{
		1117	ev_unref (EV_A);
725	w->active = 0;	1118	w->active = 0;
726	}	1119	}
727		1120
728	/*****************************************************************************/	1121	/*****************************************************************************/
729		1122
730	void	1123	void
731	evio_start (struct ev_io *w)	1124	ev_io_start (EV_P_ struct ev_io *w)
732	{	1125	{
		1126	int fd = w->fd;
		1127
733	if (ev_is_active (w))	1128	if (ev_is_active (w))
734	return;	1129	return;
735		1130
736	int fd = w->fd;	1131	assert (("ev_io_start called with negative fd", fd >= 0));
737		1132
738	ev_start ((W)w, 1);	1133	ev_start (EV_A_ (W)w, 1);
739	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1134	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
740	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1135	wlist_add ((WL *)&anfds[fd].head, (WL)w);
741		1136
742	++fdchangecnt;	1137	fd_change (EV_A_ fd);
743	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
744	fdchanges [fdchangecnt - 1] = fd;
745
746	if (w->fd == 9)
747	printf ("start %p:%x\n", w, w->events);//D
748	}	1138	}
749		1139
750	void	1140	void
751	evio_stop (struct ev_io *w)	1141	ev_io_stop (EV_P_ struct ev_io *w)
752	{	1142	{
753	if (w->fd == 9)	1143	ev_clear_pending (EV_A_ (W)w);
754	printf ("stop %p:%x\n", w, w->events);//D
755	ev_clear ((W)w);
756	if (!ev_is_active (w))	1144	if (!ev_is_active (w))
757	return;	1145	return;
758		1146
759	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1147	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
760	ev_stop ((W)w);	1148	ev_stop (EV_A_ (W)w);
761		1149
762	++fdchangecnt;	1150	fd_change (EV_A_ w->fd);
763	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
764	fdchanges [fdchangecnt - 1] = w->fd;
765	}	1151	}
766		1152
767	void	1153	void
768	evtimer_start (struct ev_timer *w)	1154	ev_timer_start (EV_P_ struct ev_timer *w)
769	{	1155	{
770	if (ev_is_active (w))	1156	if (ev_is_active (w))
771	return;	1157	return;
772		1158
773	w->at += now;	1159	((WT)w)->at += mn_now;
774		1160
775	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1161	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
776		1162
777	ev_start ((W)w, ++timercnt);	1163	ev_start (EV_A_ (W)w, ++timercnt);
778	array_needsize (timers, timermax, timercnt, );	1164	array_needsize (timers, timermax, timercnt, );
779	timers [timercnt - 1] = w;	1165	timers [timercnt - 1] = w;
780	upheap ((WT *)timers, timercnt - 1);	1166	upheap ((WT *)timers, timercnt - 1);
781	}
782		1167
		1168	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1169	}
		1170
783	void	1171	void
784	evtimer_stop (struct ev_timer *w)	1172	ev_timer_stop (EV_P_ struct ev_timer *w)
785	{	1173	{
786	ev_clear ((W)w);	1174	ev_clear_pending (EV_A_ (W)w);
787	if (!ev_is_active (w))	1175	if (!ev_is_active (w))
788	return;	1176	return;
789		1177
		1178	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1179
790	if (w->active < timercnt--)	1180	if (((W)w)->active < timercnt--)
791	{	1181	{
792	timers [w->active - 1] = timers [timercnt];	1182	timers [((W)w)->active - 1] = timers [timercnt];
793	downheap ((WT *)timers, timercnt, w->active - 1);	1183	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
794	}	1184	}
795		1185
796	w->at = w->repeat;	1186	((WT)w)->at = w->repeat;
797		1187
798	ev_stop ((W)w);	1188	ev_stop (EV_A_ (W)w);
799	}	1189	}
800		1190
801	void	1191	void
802	evtimer_again (struct ev_timer *w)	1192	ev_timer_again (EV_P_ struct ev_timer *w)
803	{	1193	{
804	if (ev_is_active (w))	1194	if (ev_is_active (w))
805	{	1195	{
806	if (w->repeat)	1196	if (w->repeat)
807	{	1197	{
808	w->at = now + w->repeat;	1198	((WT)w)->at = mn_now + w->repeat;
809	downheap ((WT *)timers, timercnt, w->active - 1);	1199	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
810	}	1200	}
811	else	1201	else
812	evtimer_stop (w);	1202	ev_timer_stop (EV_A_ w);
813	}	1203	}
814	else if (w->repeat)	1204	else if (w->repeat)
815	evtimer_start (w);	1205	ev_timer_start (EV_A_ w);
816	}	1206	}
817		1207
818	void	1208	void
819	evperiodic_start (struct ev_periodic *w)	1209	ev_periodic_start (EV_P_ struct ev_periodic *w)
820	{	1210	{
821	if (ev_is_active (w))	1211	if (ev_is_active (w))
822	return;	1212	return;
823		1213
824	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1214	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
825		1215
826	/* this formula differs from the one in periodic_reify because we do not always round up */	1216	/* this formula differs from the one in periodic_reify because we do not always round up */
827	if (w->interval)	1217	if (w->interval)
828	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1218	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
829		1219
830	ev_start ((W)w, ++periodiccnt);	1220	ev_start (EV_A_ (W)w, ++periodiccnt);
831	array_needsize (periodics, periodicmax, periodiccnt, );	1221	array_needsize (periodics, periodicmax, periodiccnt, );
832	periodics [periodiccnt - 1] = w;	1222	periodics [periodiccnt - 1] = w;
833	upheap ((WT *)periodics, periodiccnt - 1);	1223	upheap ((WT *)periodics, periodiccnt - 1);
834	}
835		1224
		1225	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1226	}
		1227
836	void	1228	void
837	evperiodic_stop (struct ev_periodic *w)	1229	ev_periodic_stop (EV_P_ struct ev_periodic *w)
838	{	1230	{
839	ev_clear ((W)w);	1231	ev_clear_pending (EV_A_ (W)w);
840	if (!ev_is_active (w))	1232	if (!ev_is_active (w))
841	return;	1233	return;
842		1234
		1235	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1236
843	if (w->active < periodiccnt--)	1237	if (((W)w)->active < periodiccnt--)
844	{	1238	{
845	periodics [w->active - 1] = periodics [periodiccnt];	1239	periodics [((W)w)->active - 1] = periodics [periodiccnt];
846	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1240	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
847	}	1241	}
848		1242
849	ev_stop ((W)w);	1243	ev_stop (EV_A_ (W)w);
850	}	1244	}
851		1245
852	void	1246	void
853	evsignal_start (struct ev_signal *w)	1247	ev_idle_start (EV_P_ struct ev_idle *w)
854	{	1248	{
855	if (ev_is_active (w))	1249	if (ev_is_active (w))
856	return;	1250	return;
857		1251
		1252	ev_start (EV_A_ (W)w, ++idlecnt);
		1253	array_needsize (idles, idlemax, idlecnt, );
		1254	idles [idlecnt - 1] = w;
		1255	}
		1256
		1257	void
		1258	ev_idle_stop (EV_P_ struct ev_idle *w)
		1259	{
		1260	ev_clear_pending (EV_A_ (W)w);
		1261	if (ev_is_active (w))
		1262	return;
		1263
		1264	idles [((W)w)->active - 1] = idles [--idlecnt];
		1265	ev_stop (EV_A_ (W)w);
		1266	}
		1267
		1268	void
		1269	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1270	{
		1271	if (ev_is_active (w))
		1272	return;
		1273
		1274	ev_start (EV_A_ (W)w, ++preparecnt);
		1275	array_needsize (prepares, preparemax, preparecnt, );
		1276	prepares [preparecnt - 1] = w;
		1277	}
		1278
		1279	void
		1280	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1281	{
		1282	ev_clear_pending (EV_A_ (W)w);
		1283	if (ev_is_active (w))
		1284	return;
		1285
		1286	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1287	ev_stop (EV_A_ (W)w);
		1288	}
		1289
		1290	void
		1291	ev_check_start (EV_P_ struct ev_check *w)
		1292	{
		1293	if (ev_is_active (w))
		1294	return;
		1295
		1296	ev_start (EV_A_ (W)w, ++checkcnt);
		1297	array_needsize (checks, checkmax, checkcnt, );
		1298	checks [checkcnt - 1] = w;
		1299	}
		1300
		1301	void
		1302	ev_check_stop (EV_P_ struct ev_check *w)
		1303	{
		1304	ev_clear_pending (EV_A_ (W)w);
		1305	if (ev_is_active (w))
		1306	return;
		1307
		1308	checks [((W)w)->active - 1] = checks [--checkcnt];
		1309	ev_stop (EV_A_ (W)w);
		1310	}
		1311
		1312	#ifndef SA_RESTART
		1313	# define SA_RESTART 0
		1314	#endif
		1315
		1316	void
		1317	ev_signal_start (EV_P_ struct ev_signal *w)
		1318	{
		1319	#if EV_MULTIPLICITY
		1320	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1321	#endif
		1322	if (ev_is_active (w))
		1323	return;
		1324
		1325	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1326
858	ev_start ((W)w, 1);	1327	ev_start (EV_A_ (W)w, 1);
859	array_needsize (signals, signalmax, w->signum, signals_init);	1328	array_needsize (signals, signalmax, w->signum, signals_init);
860	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1329	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
861		1330
862	if (!w->next)	1331	if (!((WL)w)->next)
863	{	1332	{
		1333	#if WIN32
		1334	signal (w->signum, sighandler);
		1335	#else
864	struct sigaction sa;	1336	struct sigaction sa;
865	sa.sa_handler = sighandler;	1337	sa.sa_handler = sighandler;
866	sigfillset (&sa.sa_mask);	1338	sigfillset (&sa.sa_mask);
867	sa.sa_flags = 0;	1339	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
868	sigaction (w->signum, &sa, 0);	1340	sigaction (w->signum, &sa, 0);
		1341	#endif
869	}	1342	}
870	}	1343	}
871		1344
872	void	1345	void
873	evsignal_stop (struct ev_signal *w)	1346	ev_signal_stop (EV_P_ struct ev_signal *w)
874	{	1347	{
875	ev_clear ((W)w);	1348	ev_clear_pending (EV_A_ (W)w);
876	if (!ev_is_active (w))	1349	if (!ev_is_active (w))
877	return;	1350	return;
878		1351
879	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1352	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
880	ev_stop ((W)w);	1353	ev_stop (EV_A_ (W)w);
881		1354
882	if (!signals [w->signum - 1].head)	1355	if (!signals [w->signum - 1].head)
883	signal (w->signum, SIG_DFL);	1356	signal (w->signum, SIG_DFL);
884	}	1357	}
885		1358
886	void evidle_start (struct ev_idle *w)	1359	void
		1360	ev_child_start (EV_P_ struct ev_child *w)
887	{	1361	{
		1362	#if EV_MULTIPLICITY
		1363	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1364	#endif
888	if (ev_is_active (w))	1365	if (ev_is_active (w))
889	return;	1366	return;
890		1367
891	ev_start ((W)w, ++idlecnt);	1368	ev_start (EV_A_ (W)w, 1);
892	array_needsize (idles, idlemax, idlecnt, );	1369	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
893	idles [idlecnt - 1] = w;
894	}	1370	}
895		1371
896	void evidle_stop (struct ev_idle *w)	1372	void
		1373	ev_child_stop (EV_P_ struct ev_child *w)
897	{	1374	{
898	ev_clear ((W)w);	1375	ev_clear_pending (EV_A_ (W)w);
899	if (ev_is_active (w))	1376	if (ev_is_active (w))
900	return;	1377	return;
901		1378
902	idles [w->active - 1] = idles [--idlecnt];
903	ev_stop ((W)w);
904	}
905
906	void evprepare_start (struct ev_prepare *w)
907	{
908	if (ev_is_active (w))
909	return;
910
911	ev_start ((W)w, ++preparecnt);
912	array_needsize (prepares, preparemax, preparecnt, );
913	prepares [preparecnt - 1] = w;
914	}
915
916	void evprepare_stop (struct ev_prepare *w)
917	{
918	ev_clear ((W)w);
919	if (ev_is_active (w))
920	return;
921
922	prepares [w->active - 1] = prepares [--preparecnt];
923	ev_stop ((W)w);
924	}
925
926	void evcheck_start (struct ev_check *w)
927	{
928	if (ev_is_active (w))
929	return;
930
931	ev_start ((W)w, ++checkcnt);
932	array_needsize (checks, checkmax, checkcnt, );
933	checks [checkcnt - 1] = w;
934	}
935
936	void evcheck_stop (struct ev_check *w)
937	{
938	ev_clear ((W)w);
939	if (ev_is_active (w))
940	return;
941
942	checks [w->active - 1] = checks [--checkcnt];
943	ev_stop ((W)w);
944	}
945
946	void evchild_start (struct ev_child *w)
947	{
948	if (ev_is_active (w))
949	return;
950
951	ev_start ((W)w, 1);
952	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
953	}
954
955	void evchild_stop (struct ev_child *w)
956	{
957	ev_clear ((W)w);
958	if (ev_is_active (w))
959	return;
960
961	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1379	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
962	ev_stop ((W)w);	1380	ev_stop (EV_A_ (W)w);
963	}	1381	}
964		1382
965	/*****************************************************************************/	1383	/*****************************************************************************/
966		1384
967	struct ev_once	1385	struct ev_once
…		…
971	void (*cb)(int revents, void *arg);	1389	void (*cb)(int revents, void *arg);
972	void *arg;	1390	void *arg;
973	};	1391	};
974		1392
975	static void	1393	static void
976	once_cb (struct ev_once *once, int revents)	1394	once_cb (EV_P_ struct ev_once *once, int revents)
977	{	1395	{
978	void (*cb)(int revents, void *arg) = once->cb;	1396	void (*cb)(int revents, void *arg) = once->cb;
979	void *arg = once->arg;	1397	void *arg = once->arg;
980		1398
981	evio_stop (&once->io);	1399	ev_io_stop (EV_A_ &once->io);
982	evtimer_stop (&once->to);	1400	ev_timer_stop (EV_A_ &once->to);
983	free (once);	1401	free (once);
984		1402
985	cb (revents, arg);	1403	cb (revents, arg);
986	}	1404	}
987		1405
988	static void	1406	static void
989	once_cb_io (struct ev_io *w, int revents)	1407	once_cb_io (EV_P_ struct ev_io *w, int revents)
990	{	1408	{
991	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1409	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
992	}	1410	}
993		1411
994	static void	1412	static void
995	once_cb_to (struct ev_timer *w, int revents)	1413	once_cb_to (EV_P_ struct ev_timer *w, int revents)
996	{	1414	{
997	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1415	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
998	}	1416	}
999		1417
1000	void	1418	void
1001	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1419	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1002	{	1420	{
1003	struct ev_once *once = malloc (sizeof (struct ev_once));	1421	struct ev_once *once = malloc (sizeof (struct ev_once));
1004		1422
1005	if (!once)	1423	if (!once)
1006	cb (EV_ERROR, arg);	1424	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1007	else	1425	else
1008	{	1426	{
1009	once->cb = cb;	1427	once->cb = cb;
1010	once->arg = arg;	1428	once->arg = arg;
1011		1429
1012	evw_init (&once->io, once_cb_io);	1430	ev_watcher_init (&once->io, once_cb_io);
1013
1014	if (fd >= 0)	1431	if (fd >= 0)
1015	{	1432	{
1016	evio_set (&once->io, fd, events);	1433	ev_io_set (&once->io, fd, events);
1017	evio_start (&once->io);	1434	ev_io_start (EV_A_ &once->io);
1018	}	1435	}
1019		1436
1020	evw_init (&once->to, once_cb_to);	1437	ev_watcher_init (&once->to, once_cb_to);
1021
1022	if (timeout >= 0.)	1438	if (timeout >= 0.)
1023	{	1439	{
1024	evtimer_set (&once->to, timeout, 0.);	1440	ev_timer_set (&once->to, timeout, 0.);
1025	evtimer_start (&once->to);	1441	ev_timer_start (EV_A_ &once->to);
1026	}	1442	}
1027	}	1443	}
1028	}	1444	}
1029		1445
1030	/*****************************************************************************/
1031
1032	#if 0
1033
1034	struct ev_io wio;
1035
1036	static void
1037	sin_cb (struct ev_io *w, int revents)
1038	{
1039	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1040	}
1041
1042	static void
1043	ocb (struct ev_timer *w, int revents)
1044	{
1045	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1046	evtimer_stop (w);
1047	evtimer_start (w);
1048	}
1049
1050	static void
1051	scb (struct ev_signal *w, int revents)
1052	{
1053	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1054	evio_stop (&wio);
1055	evio_start (&wio);
1056	}
1057
1058	static void
1059	gcb (struct ev_signal *w, int revents)
1060	{
1061	fprintf (stderr, "generic %x\n", revents);
1062
1063	}
1064
1065	int main (void)
1066	{
1067	ev_init (0);
1068
1069	evio_init (&wio, sin_cb, 0, EV_READ);
1070	evio_start (&wio);
1071
1072	struct ev_timer t[10000];
1073
1074	#if 0
1075	int i;
1076	for (i = 0; i < 10000; ++i)
1077	{
1078	struct ev_timer *w = t + i;
1079	evw_init (w, ocb, i);
1080	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1081	evtimer_start (w);
1082	if (drand48 () < 0.5)
1083	evtimer_stop (w);
1084	}
1085	#endif
1086
1087	struct ev_timer t1;
1088	evtimer_init (&t1, ocb, 5, 10);
1089	evtimer_start (&t1);
1090
1091	struct ev_signal sig;
1092	evsignal_init (&sig, scb, SIGQUIT);
1093	evsignal_start (&sig);
1094
1095	struct ev_check cw;
1096	evcheck_init (&cw, gcb);
1097	evcheck_start (&cw);
1098
1099	struct ev_idle iw;
1100	evidle_init (&iw, gcb);
1101	evidle_start (&iw);
1102
1103	ev_loop (0);
1104
1105	return 0;
1106	}
1107
1108	#endif
1109
1110
1111
1112

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